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HelpTest Code VB12 Vitamin B12
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 3 days |
| Refrigerate | 7 days |
| Frozen | 3 months |
Specimen Condition
| Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Age | |
|---|---|
| 5 days – < 1yr | 191 – 1,163 pmol/L |
| 1 – 8 yrs | 209 – 1,190 pmol/L |
| 9 – 13 yrs | 186 – 830 pmol/L |
| 14 – 16 yrs | 180 – 655 pmol/L |
| 17 – 18 yrs | 150 – 599 pmol/L |
| ≥ 19 yrs | 138 – 652 pmol/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of pernicious anaemia. Increased levels are seen in hepatic cell damage and myeloid leukemia.
Service Code
31732
Update
Last updated 11/03/2025
Laboratory Code
LAB67
LOINC Code Information
14685-2